Reports

Strain Measurements and the Potential for a Great Subduction Earthquake Off the Coast of Washington

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Science  05 Apr 1991:
Vol. 252, Issue 5002, pp. 101-103
DOI: 10.1126/science.252.5002.101

Abstract

Geodetic measurements of deformation in northwestern Washington indicate that strain is accumulating at a rate close to that predicted by a model of the Cascadia subduction zone in which the plate interface underlying the continental slope and outer continental shelf is currently locked but the remainder of the interface slips continuously. Presumably this locked segment will eventually rupture in a great thrust earthquake with a down-dip extent greater than 100 kilometers.

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